Diego Segui threw out the first pitch in Mariners history April 6, 1977 vs. the California Angels at the Kingdome.

Segui was a relief pitcher for the Seattle Pilots, a team that played all of one season in Seattle in 1969. The Pilots moved to Milwaukee in 1970 and became the Brewers, while Seattle would have to wait out a seven-year itch for Major League baseball to return to the city.

Diego Segui pitched in the first ever games for both the Seattle Pilots (1969) and the Seattle Mariners (1977).

He was chosen by teammates as the MVP of the Seattle Pilots in 1969 after going 12-6, pitching mostly out of the bullpen, recording 12 saves, 113 strikeouts and a 3.35 ERA (53 ER, 142.1 IP). As a Mariner he set an early club record by striking out 10 Red Sox in a game. Segui ended his 16-year Major League career in a Mariners uniform in 1977.

Will fans see his famous forkball when he makes his appearance at Safeco Field on Saturday?

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